Windows support is close. See this issue:
Re:Crystal Programming Language
by db65edfc7996 on Friday September 02, 2022 @08:07PM
(#32697165)
Windows support has been a target since 2013. That's too long for me to put any credibility in projections on when it will be generally released.
Crytal can disable GC and runtime too.
https://crystal-lang.org/reference/1.4/syntax_and_semantics/...
Of course, same as Nim, you lose access to most of the stdlib.
Tmk Crystal still lacks Windows support as well and probably other os's / archs's compared to Nim